Handle

• handle [countable]
• 1 the part of a door that you use for opening it:
• Then he turned the handle and went in.
• 2 the part of an object that you use for holding it:
• a knife with a carved wooden handle
• the handle of his cup
• a broom handle
• 3

  get a handle on something

   to start to understand a situation, subject etc:
• It's difficult to get a handle on how widespread this problem is.

• ➔ fly off the handle

  at fly1 (16)

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.